Relativistic BCS-BEC crossover in a boson-fermion model
نویسندگان
چکیده
منابع مشابه
Universality in the BCS - BEC Crossover in Cold Fermion Gases
There are two cornerstones for the description of quantum condensation phenomena: Bose-Einstein condensation (BEC) in bosonic systems and BCSpairing for fermions. The underlying pictures for these phenomena are quite different – BEC is the macroscopic population of a single quantum state, while the BCS mechanism relies on the formation of Cooper pairs. However, both phenomena share a decisive f...
متن کاملThe BCS-BEC crossover and superconductivity in a lattice fermion model with hard core repulsion
We have considered the BCS-BEC crossover at T = 0 in the framework of a lattice fermion model (the extended Hubbard model). We have analyzed the case of on-site hard core repulsion (U = ∞) and intersite attraction (W < 0) in a 3D system with extended s-wave pairing symmetry. The mechanisms of density-driven and attraction-strength-driven crossover have been analyzed. We have obtained the ground...
متن کاملCrossover from BCS to BEC ? —
We discuss a possibility of transition from color superconductivity of the standard BCS type at high density, to Bose-Einstein Condensation (BEC) of Cooper pairs at lower density. Examining two-flavor QCD over a wide range of baryon density, we found the size of a Cooper pair becomes small enough to be comparable to the averaged quark-quark distance at lower density. We also consider the same p...
متن کاملCritical temperature curve in BEC-BCS crossover.
The strongly correlated regime of the crossover from Bardeen-Cooper-Schrieffer pairing to Bose-Einstein condensation can be realized by diluting a system of two-component fermions with a short-range attractive interaction. We investigate this system via a novel continuous-space-time diagrammatic determinant Monte Carlo method and determine the universal curve Tc/epsilonF for the transition temp...
متن کاملBCS-to-BEC crossover from the exact BCS solution
The BCS-to-BEC crossover, as well as the nature of Cooper pairs, in superconducting and Fermi superfluid media is studied from the exact ground state wave function of the reduced BCS Hamiltonian. As the strength of the interaction increases, the ground state continuously evolves from a mixed system of quasifree fermions and pair resonances BCS , to pair resonances and quasibound molecules pseud...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.76.034013